Communication
Telephony & PBX
Phone system software for SIP/VoIP calling, call routing, voicemail, and PBX operations.
Best Telephony & PBX tools by public signals
These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.
Use Case Rankings
Ordered by ToolVitals score, then health, shipping, confidence, GitHub stars, and name.
| # | Tool | Health | Shipping | Openness | Stars | Score | Status |
|---|---|---|---|---|---|---|---|
| 01 | Kamailio Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability | 96 | 95 | OSI-approved OSS | 3k | 96 | Active |
| 02 | FS PBX Open-source PBX platform for business telephony and VoIP deployments. | 96 | 95 | OSI-approved OSS | 253 | 95 | Active |
| 03 | dograh Open-source voice agent platform. | 96 | 94 | OSI-approved OSS | 6k | 95 | Active |
| 04 | MikoPBX Open-source PBX for small business built on Asterisk. | 95 | 94 | OSI-approved OSS | 593 | 94 | Active |
| 05 | Fonoster 🚀 The open-source alternative to Twilio. | 92 | 94 | OSI-approved OSS | 8.2k | 93 | Active |
| 06 | Linphone Linphone is a free VoIP and video softphone based on the SIP protocol. Mirror of git://git.linphone.org/linphone-desktop.git | 87 | 83 | OSI-approved OSS | 512 | 85 | Active |
| 07 | ICTFAX Open source fax server software for inbound and outbound faxing with API integration. | 85 | 81 | OSI-approved OSS | 239 | 83 | Active |
Not Scored
Tracked for context, but excluded from rankings because comparable open/source-visible evidence is unavailable.
FastAICC
Open-source AI call center solution with FreeSWITCH and LLM support.
ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.GoNopbx
Web GUI for Asterisk PBX with extensions, SIP trunks, voicemail, and real-time dashboard.
ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.